"""(GB Internal) Railway Air Service, a rare first flight, Douglas to Birmingham via Manchester, bs Birmingham 21 Aug 34, flown to Manchester on the first day of the service, then by rail to Birmingham, an official cover franked KGV 1 1/2d and postmarked 'Douglas Isle of Man/ 10am/20 Aug 1934', typed """"By Air from Isle of Man to Birmingham"""". According to Redgrove, p61, flown Douglas-Manchester covers are very rare due to an error made by RAS officials at Douglas, who posted the bulk of the souvenir mail after the plane had left for Manchester. These bear a 4pm postmark. Only a handful were posted in time for the flight - these are postmarked 10am. Only 10 such are known and even fewer have back stamps."""
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